v0.16.0

Release date: August 06, 2025

👍 Highlights

• PromQL:

  • Adds absent() function for missing series detection (#6618).
  • Enhances PromQL compatibility with OLTP metrics (#6543).
  • Supports querying label values from internal labels __schema__ and __database__ (#6631).

• Observability Improvements: Provides a panic logger, HTTP API to toggle heap profiling (enabled by default), and more verbose logs/metrics in EXPLAIN ANALYZE VERBOSE (#6633, #6593, #6575).

Breaking changes

• refactor: replace pipeline::value with vrl::value

  If you used greptime_identity to write positive integer data before version 0.16.0, in the following two cases:

  • Writing in nd-json format (vector greptimedb_logs sink),
  • Writing in json format, with values in the range between i64::MAX and u64::MAX

  The integer type would be recognized as u64. After version 0.16.0, however, greptime_identity will recognize this data as i64 (please note not to write data greater than i64::MAX). This may cause a mismatch between the written data and the table schema, or an overflow leading to write failures. You can use desc table_name to confirm the actual data type. You can directly modify the table structure to fix this issue, or use Transform in version 2 for custom type conversion.

📊 Dashboard v0.10.6

• Sidebar Controls – Toggle visibility from left menu and persist tables sidebar width.
• Data View Fullscreen Mode - Query results can be displayed in fullscreen for enhanced data analysis experience.
• Refactored Log/Trace View - Improved log and trace viewing functionality with better user interface and performance.

🚀 Features

• feat: add RegionId to FileId by @waynexia in #6410
• feat: move metasrv admin to http server while keep tonic for backward compatibility by @lyang24 in #6466
• feat(mito): replace Memtable::iter with Memtable::ranges by @v0y4g3r in #6549
• feat: supports more db options by @killme2008 in #6529
• feat: allow ignoring nonexistent regions in recovery mode by @WenyXu in #6592
• feat: impl some promql scalar functions by @killme2008 in #6567
• feat: poll result stream more often by @discord9 in #6599
• feat: fallback when failed to push down using DistPlanner by @discord9 in #6574
• feat: add SET DEFAULT syntax by @linyihai in #6421
• feat: struct vector by @discord9 in #6595
• feat: trigger alter parse by @fengys1996 in #6553
• feat: update dashboard to v0.10.5 by @ZonaHex in #6604
• feat: allow setting next table id via http api by @WenyXu in #6597
• feat: ignore internal keys in metadata snapshots by @WenyXu in #6606
• feat: introduce reconcile table procedure by @WenyXu in #6584
• feat: more logs and metrics under explain verbose mode by @evenyag in #6575
• feat: introduce reconcile database procedure by @WenyXu in #6612
• feat: introduce reconcile logical tables procedure by @WenyXu in #6588
• feat: HTTP API to activate/deactive heap prof (activate by default) by @evenyag in #6593
• feat: Implement a converter to converts KeyValues into BulkPart by @evenyag in #6620
• feat: introduce reconcile catalog procedure by @WenyXu in #6613
• feat: panic logger by @discord9 in #6633
• feat: update dashboard to v0.10.6 by @ZonaHex in #6632
• feat: support __schema__ and __database__ in Prom Remote Read by @waynexia in #6610
• feat: support tls for pg backend by @waynexia in #6611
• feat: absent function in PromQL by @waynexia in #6618
• feat: Add option to limit the files reading simultaneously by @evenyag in #6635
• feat: introduce reconciliation interface by @WenyXu in #6614
• feat: add partial truncate by @discord9 in #6602
• feat: schema/database support for label_values by @sunng87 in #6631
• feat: implements FlatReadFormat to project parquets with flat schema by @evenyag in #6638
• feat: use real data to truncate manipulate range by @waynexia in #6649
• feat: Implements an iterator to read the RecordBatch in BulkPart by @evenyag in #6647
• feat: register all aggregate function to auto step aggr fn by @discord9 in #6596
• feat: use column expr with filters in LogQuery by @waynexia in #6646
• feat: record the migration events in metasrv by @zyy17 in #6579
• feat: support TQL CTE in planner by @waynexia in #6645
• feat(log-query): support binary op, scalar fn & is_true/is_false by @waynexia in #6659
• feat: EncodedBulkPartIter iters flat format and returns RecordBatch by @evenyag in #6655
• feat: count underscore in English tokenizer and improve performance by @waynexia in #6660

🐛 Bug Fixes

• fix: aggr group by all partition cols use partial commutative by @discord9 in #6534
• fix: closee issue #6555 return empty result by @yihong0618 in #6569
• fix: ignore target files in make fmt-check by @yihong0618 in #6560
• fix: close issue #6586 make pg also show error as mysql by @yihong0618 in #6587
• fix: add map datatype conversion in copy_table_from (#6185) by @Arshdeep54 in #6422
• fix(test): concurrency issue in compaction tests by @v0y4g3r in #6615
• fix: only return the name label when there is one by @waynexia in #6629
• fix: bump greptime-sqlparser to avoid convert statement overflow by @kemingy in #6634
• fix: show create flow's expire after by @discord9 in #6641
• fix: fix sequence peek method to return correct values when sequence is not initialized by @WenyXu in #6643
• fix: sequence peek with remote value by @fengjiachun in #6648
• fix: not mark all deleted when partial trunc by @discord9 in #6654
• fix: box Explain node in Statement to reduce stack size by @waynexia in #6661
• fix: unable to record slow query by @zyy17 in #6590

🚜 Refactor

• refactor: refactor partition mod to use PartitionExpr instead of PartitionDef by @zhongzc in #6554
• refactor: remove unused PartitionDef by @zhongzc in #6573
• refactor: explicitly accept path type as param by @zhongzc in #6583
• refactor(otlp_metric): make otlp metric compatible with promql by @shuiyisong in #6543
• refactor: remove procedure executor from DDL manager by @WenyXu in #6625

📚 Documentation

• docs(rfc): repartition by @waynexia in #6557
• docs(rfc): compatibility test framework by @waynexia in #6460

⚡ Performance

• perf: Reduce fulltext bloom load time by @evenyag in #6651

⚙️ Miscellaneous Tasks

• chore(otlp_metric): support attr list in header opts by @shuiyisong in #6617
• chore(otlp_metric): update metric and label naming by @shuiyisong in #6624
• chore: refine metrics tracking the flush/compaction cost time by @v0y4g3r in #6630
• chore: update jieba tantivy-jieba and tantivy version by @yihong0618 in #6637
• chore: add limit in resources panel and Cache Miss panel by @zyy17 in #6636
• chore: add methods to catalog manager by @v0y4g3r in #6656

New Contributors

• @kemingy made their first contribution in #6634
• @lyang24 made their first contribution in #6466

All Contributors

We would like to thank the following contributors from the GreptimeDB community:

@Arshdeep54, @WenyXu, @ZonaHex, @discord9, @evenyag, @fengjiachun, @fengys1996, @kemingy, @killme2008, @linyihai, @lyang24, @shuiyisong, @sunng87, @v0y4g3r, @waynexia, @yihong0618, @zhongzc, @zyy17